Calmodulin is an important molecule that binds calcium and stimulates the activity of calmodulin-dependent kinases. Calmodulin mediates many important reactions in the cell, including excitation contraction coupling of muscle cells.
intracellular protein that binds with calcium ions and activates or inhibits enzymes, many of which are protein kinases, to elicit physiological responses of hormones
Ubiquitous Ca2+-binding protein whose binding to other proteins is governed by changes in intracellular Ca2+ concentration. Its binding modifies the activity of many target enzymes and membrane transport proteins.
A small cytosolic protein that binds four Ca2+ ions; the Ca2+-calmodulin complex binds to and activates many enzymes. ( Figure 20-40)
In smooth muscle, binds with calcium to form a complex to regulate actin-myosin crossbridge function. Performs similar role to troponin in skeletal muscle.
A calcium binding protein.
(kal- mod-yoo-lin) An intracellular protein to which calcium binds in its function as a second messenger in hormone action.
Calmodulin (CaM) is a Ca2+-binding protein that is a key component of the Ca2+ second-messenger system and is involved in controlling many of the biochemical processes of cells.